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<div class="title">session.c</div>  </div>
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<a href="session_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/* dtls -- a very basic DTLS implementation</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (C) 2011--2014 Olaf Bergmann &lt;bergmann@tzi.org&gt;</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * Permission is hereby granted, free of charge, to any person</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * obtaining a copy of this software and associated documentation</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * files (the &quot;Software&quot;), to deal in the Software without</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * restriction, including without limitation the rights to use, copy,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * modify, merge, publish, distribute, sublicense, and/or sell copies</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * of the Software, and to permit persons to whom the Software is</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * furnished to do so, subject to the following conditions:</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * The above copyright notice and this permission notice shall be</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * included in all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"> * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"> * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"> * SOFTWARE.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="dtls__config_8h.html">dtls_config.h</a>&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="session_8h.html">session.h</a>&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#ifdef HAVE_ASSERT_H</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#ifndef assert</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#warning &quot;assertions are disabled&quot;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#  define assert(x)</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#ifdef WITH_CONTIKI</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define _dtls_address_equals_impl(A,B)              \</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">  ((A)-&gt;size == (B)-&gt;size                   \</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">   &amp;&amp; (A)-&gt;port == (B)-&gt;port                    \</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">   &amp;&amp; uip_ipaddr_cmp(&amp;((A)-&gt;addr),&amp;((B)-&gt;addr))         \</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">   &amp;&amp; (A)-&gt;ifindex == (B)-&gt;ifindex)</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#else </span><span class="comment">/* WITH_CONTIKI */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> </div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="session_8c.html#af9b9333222aabb1440f5c7846f7be85f">   48</a></span>&#160;<a class="code" href="session_8c.html#af9b9333222aabb1440f5c7846f7be85f">_dtls_address_equals_impl</a>(<span class="keyword">const</span> <a class="code" href="structsession__t.html">session_t</a> *a,</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;              <span class="keyword">const</span> <a class="code" href="structsession__t.html">session_t</a> *b) {</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  <span class="keywordflow">if</span> (a-&gt;<a class="code" href="structsession__t.html#aafc69fe43548bd69c0e15aa82e73f3ff">ifindex</a> != b-&gt;<a class="code" href="structsession__t.html#aafc69fe43548bd69c0e15aa82e73f3ff">ifindex</a> ||</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;      a-&gt;<a class="code" href="structsession__t.html#aed21682e9f971221d9f35f1266dea125">size</a> != b-&gt;<a class="code" href="structsession__t.html#aed21682e9f971221d9f35f1266dea125">size</a> || a-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a8d0a30ccc98425675a1b0e92e96eaa6a">sa</a>.sa_family != b-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a8d0a30ccc98425675a1b0e92e96eaa6a">sa</a>.sa_family)</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;  </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;  <span class="comment">/* need to compare only relevant parts of sockaddr_in6 */</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160; <span class="keywordflow">switch</span> (a-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a8d0a30ccc98425675a1b0e92e96eaa6a">sa</a>.sa_family) {</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; <span class="keywordflow">case</span> AF_INET:</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;   <span class="keywordflow">return</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;     a-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a86093095c1ab36b12180f9215fa2375e">sin</a>.sin_port == b-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a86093095c1ab36b12180f9215fa2375e">sin</a>.sin_port &amp;&amp; </div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;     memcmp(&amp;a-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a86093095c1ab36b12180f9215fa2375e">sin</a>.sin_addr, &amp;b-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a86093095c1ab36b12180f9215fa2375e">sin</a>.sin_addr, </div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        <span class="keyword">sizeof</span>(<span class="keyword">struct</span> in_addr)) == 0;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160; <span class="keywordflow">case</span> AF_INET6:</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;   <span class="keywordflow">return</span> a-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a2f337ce1989f3a9b5afeef1a95506bde">sin6</a>.sin6_port == b-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a2f337ce1989f3a9b5afeef1a95506bde">sin6</a>.sin6_port &amp;&amp; </div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;     memcmp(&amp;a-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a2f337ce1989f3a9b5afeef1a95506bde">sin6</a>.sin6_addr, &amp;b-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>.<a class="code" href="structsession__t.html#a2f337ce1989f3a9b5afeef1a95506bde">sin6</a>.sin6_addr, </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        <span class="keyword">sizeof</span>(<span class="keyword">struct</span> in6_addr)) == 0;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160; <span class="keywordflow">default</span>: <span class="comment">/* fall through and signal error */</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;   ;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160; }</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;}</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* WITH_CONTIKI */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="keywordtype">void</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="session_8h.html#af5aad44a94929b1ebfbb3c6334e9e501">   73</a></span>&#160;<a class="code" href="session_8c.html#af5aad44a94929b1ebfbb3c6334e9e501">dtls_session_init</a>(<a class="code" href="structsession__t.html">session_t</a> *sess) {</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;  assert(sess);</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  memset(sess, 0, <span class="keyword">sizeof</span>(<a class="code" href="structsession__t.html">session_t</a>));</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  sess-&gt;<a class="code" href="structsession__t.html#aed21682e9f971221d9f35f1266dea125">size</a> = <span class="keyword">sizeof</span>(sess-&gt;<a class="code" href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">addr</a>);</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;}</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="keywordtype">int</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="session_8h.html#a96f4d60f388d56d37b3e69261bea2417">   80</a></span>&#160;<a class="code" href="session_8c.html#a96f4d60f388d56d37b3e69261bea2417">dtls_session_equals</a>(<span class="keyword">const</span> <a class="code" href="structsession__t.html">session_t</a> *a, <span class="keyword">const</span> <a class="code" href="structsession__t.html">session_t</a> *b) {</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  assert(a); assert(b);</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;  <span class="keywordflow">return</span> <a class="code" href="session_8c.html#af9b9333222aabb1440f5c7846f7be85f">_dtls_address_equals_impl</a>(a, b);</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;}</div>
<div class="ttc" id="session_8c_html_a96f4d60f388d56d37b3e69261bea2417"><div class="ttname"><a href="session_8c.html#a96f4d60f388d56d37b3e69261bea2417">dtls_session_equals</a></div><div class="ttdeci">int dtls_session_equals(const session_t *a, const session_t *b)</div><div class="ttdef"><b>Definition:</b> <a href="session_8c_source.html#l00080">session.c:80</a></div></div>
<div class="ttc" id="session_8c_html_af5aad44a94929b1ebfbb3c6334e9e501"><div class="ttname"><a href="session_8c.html#af5aad44a94929b1ebfbb3c6334e9e501">dtls_session_init</a></div><div class="ttdeci">void dtls_session_init(session_t *sess)</div><div class="ttdef"><b>Definition:</b> <a href="session_8c_source.html#l00073">session.c:73</a></div></div>
<div class="ttc" id="dtls__config_8h_html"><div class="ttname"><a href="dtls__config_8h.html">dtls_config.h</a></div></div>
<div class="ttc" id="structsession__t_html"><div class="ttname"><a href="structsession__t.html">session_t</a></div><div class="ttdef"><b>Definition:</b> <a href="session_8h_source.html#l00049">session.h:49</a></div></div>
<div class="ttc" id="session_8h_html"><div class="ttname"><a href="session_8h.html">session.h</a></div></div>
<div class="ttc" id="structsession__t_html_aed21682e9f971221d9f35f1266dea125"><div class="ttname"><a href="structsession__t.html#aed21682e9f971221d9f35f1266dea125">session_t::size</a></div><div class="ttdeci">socklen_t size</div><div class="ttdef"><b>Definition:</b> <a href="session_8h_source.html#l00050">session.h:50</a></div></div>
<div class="ttc" id="session_8c_html_af9b9333222aabb1440f5c7846f7be85f"><div class="ttname"><a href="session_8c.html#af9b9333222aabb1440f5c7846f7be85f">_dtls_address_equals_impl</a></div><div class="ttdeci">static int _dtls_address_equals_impl(const session_t *a, const session_t *b)</div><div class="ttdef"><b>Definition:</b> <a href="session_8c_source.html#l00048">session.c:48</a></div></div>
<div class="ttc" id="structsession__t_html_a8d0a30ccc98425675a1b0e92e96eaa6a"><div class="ttname"><a href="structsession__t.html#a8d0a30ccc98425675a1b0e92e96eaa6a">session_t::sa</a></div><div class="ttdeci">struct sockaddr sa</div><div class="ttdef"><b>Definition:</b> <a href="session_8h_source.html#l00052">session.h:52</a></div></div>
<div class="ttc" id="structsession__t_html_aafc69fe43548bd69c0e15aa82e73f3ff"><div class="ttname"><a href="structsession__t.html#aafc69fe43548bd69c0e15aa82e73f3ff">session_t::ifindex</a></div><div class="ttdeci">uint8_t ifindex</div><div class="ttdef"><b>Definition:</b> <a href="session_8h_source.html#l00057">session.h:57</a></div></div>
<div class="ttc" id="structsession__t_html_a0bb4423cd29b415a4cf6c32d5d9a43e4"><div class="ttname"><a href="structsession__t.html#a0bb4423cd29b415a4cf6c32d5d9a43e4">session_t::addr</a></div><div class="ttdeci">union session_t::@2 addr</div></div>
<div class="ttc" id="structsession__t_html_a2f337ce1989f3a9b5afeef1a95506bde"><div class="ttname"><a href="structsession__t.html#a2f337ce1989f3a9b5afeef1a95506bde">session_t::sin6</a></div><div class="ttdeci">struct sockaddr_in6 sin6</div><div class="ttdef"><b>Definition:</b> <a href="session_8h_source.html#l00055">session.h:55</a></div></div>
<div class="ttc" id="structsession__t_html_a86093095c1ab36b12180f9215fa2375e"><div class="ttname"><a href="structsession__t.html#a86093095c1ab36b12180f9215fa2375e">session_t::sin</a></div><div class="ttdeci">struct sockaddr_in sin</div><div class="ttdef"><b>Definition:</b> <a href="session_8h_source.html#l00054">session.h:54</a></div></div>
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